Gyratory structure.



No. 883,526. PATENTED MAR. 31, 1908.

G. W. COMES.

GYRATORY STRUCTURE.

APPLICATION FILED MAR. 22, 1907.

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79 'earge 71 00/7251 is a specification.

'- UNITED STATES PATENT OFFICE.

GEORGE WILLIAM COMBS, OF LEAVENWORTH, KANSAS.

GYRATORY STRUCTURE.

To all whom it may concern:

Be it known that I, GEORGE- WILLIAM CoMBs, a citizen of the United States, residing at Leavenworth, in the county of Leavenworth and State of Kansas, have invented certain new and useful Improvements in Gyratory Structures, of which the following This invention relates to improvements in mechanical movements; and my objects are, first to provide novel means for imparting a gyratory motion to flour sifters, machines for sizing and sorting grain, ores, coal and the like; second, to dispense with the crank mechanism usually employed to produce a gyratory movement, and avoid the excessive .,wear and harmful VIbI'atIOIIS' experlenced when usmg the said crank mechamsm, and

BOXES 1 are connected trally-disposed third, to avoid abnormal throw of the gyrating structure regardless of the speed at which it is traveling.

I attain the above objects by employing one or more self-contained members which are, preferably, oontrolled by the speed of the gyrating structure, and being thus controlled, are automatically adjusted to bal-- ance said structure whether the latter be starting or stopping, or rotating at constant or variable s eed. a

In order t at the invention may, be fully understood, reference will now be made to the accompanying drawing, inwhich':

Figure l'represents a gyratory structure provlded with my invention. Figs. 2 and 3 are plan views of the adjustable members, forming the invention.

The device may be applied to any a proved form of gyratory structure. In t e drawing I have shown it applied to a boltingmachine consistin of oppositely-disposed sieve-boxes 1, free y suspended by flexible reeds or rods 2, depending from the ceiling 3 of the building containmg the structure.

lower ends by a air of spiders 4, havmg cenearings' 5, in which a verti cal shaft 6 is journaled, said shaft being supported by an antifriction roller bearing 7, se-

cured thereto by a set-screw 8 and resting upon the lower bearing 5. Shaft 6 is driven by a yieldingly-supported shaft 9, .so that it Wlll be free to gyrate with the sieveboxes. Shaft 9 is connected at its lower end to the upper end of shaft 6 by a universal cou ling 10, and at its upper end to a drive sha t 11 by a universal coupling 12. Drive shaft 11 is Specification of Letters Patent.

Application filed March 22, 1907. Serial No. 363,948.

at their up er and P shaft 6,

Patented'March 31, 1908.

motion when shaft 6 is started, without bucking and unduly straining the parts, as would be the case if member 15 were sus pended at one side of the shaft, as in the latter instance the member would unbalance the sieve structure at all times except when it attained the critical speed of rotation.

and driven by a The sides of member 15 diverge towardits free end so that said end will be heavier than its pivotedend, and its enlarged portion. 17

has a pocketl8- for the reception of one or more weights 19, secured in said pocket by a bolt 20 and a retaining-nut 21. 1- Thus the weight of member 15 maybeadjristed tojmpart the proper gyratory motion to the structure.

When shaft 6 is rotated the friction between it and its bearings will impart slight swaying motion to the structure and cause member 15 to swing out of line with the axis of said shaft. The centrifugal force will then swing member 15 upwardly, the rise thereof belng in proportion to the rate of speed at which the structure is driven. For instance, as the speed increases centrifugal force will cause the free end of member 15 to more nearly approach a horizontal plane, and as the speed diminishes said free end will more nearly approach a perpendicular position, and thus at all times automatically prevent abnormal gyratory motion of the structure. v

If member 15 were fixed at right angles to it would unbalance the structure to an excessive degree while gyrating, and cause it to have abnormal outward throw at all times except when said structure had attained the critical speed of rotation, at

which time the structure and the member would be in perfect balance, but the instant the speed increased or diminished the structure would again be thrown out of its normal gyratory motion.

The weight of member 15 is increased in proportion to the weight of the gyratory member from swinging upwardly in an opposite direction to member 22, as it is obvious that both members must swing in the same direction to obtain the best results. When member 15 alone is employed the lip 24 may be dispensed with so that said member will be free to'swing in either direction.

I do not wish it to be understood that I limit myself to the details of construction shown and described, as the invention resides broadly in one or more members for imparting and controlling the gyratory motion of a structure.

Having thus described my invention, what I claim is 1. A gyratory structure. consisting of a pair of oppositely-disposed sieve-boxes, a centrally-disposed vertical shaft connected to said boxes for gyrating the same, and a centrifugally-controlled member pivoted to the lower end of the shaftso that it may hang in axial alinement therewith when at rest.

2. A gyratory structure including a vertical shaft, in combination with a centrifugally-controlled member pivoted to the lower end of said shaft so that it may hang in alinement therewith when at rest, substantially as described.

3. A gyratory structure including a vertical shaft, in combination with -a centrifugally-controlled member pivoted to the upper portion of said shaft, a centrifugallycontrolled member pivoted at the lower end of said shaft so that it may hang in alinement therewith when at rest, and means for preventing the lower mmber from swinging upwardly in a direction opposite to the upper member.

4. A gyratory structure including a suspended vertical shaft, yielding power transmission devices connected to said shaft for rotating the same, and a centrifugally-controlled member pivoted to the lower end of the shaft so that it may hang in alinement therewith when at rest.

5. A gyratory structure including a shaft, a yielding power transmission device connected to said shaft for rotating the same, a block secured to the lower end of said shaft, and a centrifugally-controlled member pivoted to said block so that it may hang in vertical alinement with the shaft.

In testimony whereof I afiix my signature, in the presence of two witnesses.

. GEORGE WILLIAM COMBS.

Witnesses:

G. R. COMBS,

F. D. CoMBs. 1 

